DiCaprio plays Dom Cobb, a talented thief in the world of corporate espionage. Only he doesn't break into buildings, he breaks into people's minds and steals ideas from their dreams. Page plays Ariadne, Cobb's sidekick, who is learning the tricks of his unique trade. After a successful career of psychic infiltration, Cobb is set up by a mysterious figure who forces him to pull off his biggest mind break-in and plant an idea into an unsuspecting head.